What correctly describes the cause and effect of carcinogens on lung tissue?
1 )
Cells of the alveoli walls divide more rapidly than normal by reduction division causing atumour to develop.
2 )
Cilia are paralysed, mucus accumulates in the lungs, causing DNA to change, reduction division and a tumour to develop.
DNA changes, causing bronchial epithelial cells to divide in an uncontrolled way by mitosis and a tumour to develop.
4 )
Haemoglobin carries less oxygen, causing bronchial cells to divide in an uncontrolled way by mitosis and a tumour to develop.
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